x$kcbbes checkpoint

Q: some documentation talks about non-checkpoint based DBWR writes, does anyone know how to produce an example of that?

I’ve only seen writes based on a checkpoint (row in X$ACTIVECKPT) so far.

x$kcbbes Check incremental checkpoints (259586.1)

TanelPoder’s script @kcbbes

SQL> @kcbbes
List background I/O write priorities and reasons from X$KCBBES...
(X$KCBBES = Kerncel Cache Buffers dB writer Event Statistics)

      INDX REASON_NAME            REASON_BUFFERS    REASON% PRIORITY_NAME    PRIORITY_BUFFERS      PRIO% IO_PROC_STATUS             IO_COUNT    STATUS%
---------- ---------------------- -------------- ---------- ---------------- ---------------- ---------- ------------------------ ---------- ----------
         0 Invalid Reason                      0            Invalid Priority                0            Queued For Writing       3982646704         48
         1 Ping Write                     269635          0 High Priority           254978412        3.1 Deferred (log file sync)          0
         2 High Prio Thread Ckpt               0            Medium Priority        4112475022       49.6 Already being written     380103989        4.6
         3 Instance Recovery Ckpt       24999170         .3 Low Priority           3926243756       47.3 Buffer not dirty             109738          0
         4 Med Prio (incr) Ckpt       4087475852       49.3                                 0            Buffer is pinned              87632          0
         5 Aging Writes                        0                                            0            I/O limit reached                 0
         6 Media Recovery Ckpt                 0                                            0            Buffer logically flushed          0
         7 Low Prio Thread Ckpt          3235829          0                                 0            No free IO slots                137          0
         8 Tablespace Ckpt               1091896          0                                 0                                     3930748990       47.4
         9 Reuse Object Ckpt             1122729          0                                 0                                              0
        10 Reuse Block Range Ckpt      164534171          2                                 0                                              0
        11 Limit Dirty Buff Ckpt      3750179631       45.2                                 0                                              0
        12 Smart Scan Ckpt             254708777        3.1                                 0                                              0
        13                                     0                                            0                                              0
        14 Direct Path Read Ckpt         6079500         .1                                 0                                              0
        15                                     0                                            0                                              0
        16                                     0                                            0                                              0
        17                                     0                                            0                                              0
        18                                     0                                            0                                              0

19 rows selected.